Circuit arrangement and method for the operation of high-pressure gas discharge lamps

A circuit arrangement for providing a lamp power to a high-pressure gas discharge lamp comprising:

• an inverter which is supplied with a supply voltage, the supply voltage obtaining its energy from a line voltage for operating a high-pressure gas discharge lamp, wherein the inverter supplies to the high-pressure gas discharge lamp a lamp current which is essentially an alternating current with a modulated operating frequency which continuously oscillates within a range between a minimum frequency and a maximum frequency;
• and
• a coupling network which is connected between the inverter and the lamp and has a transfer function which describes the dependence of the amplitude of the lamp current on the operating frequency,
• wherein the difference between maximum frequency and minimum frequency is at least 10 kHz, and
• wherein during lamp operation, the supply voltage has a maximum value and a minimum value, the difference between maximum value and minimum value being at least 50 V.